CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 4,615	$ 959	$ 8,380	$ 1,176
Other comprehensive income (loss), net of tax:
Change in foreign currency translation gain (loss), net of tax	1,725	261	1,569	(1,613)
Change in unrealized gain (loss) on available-for-sale debt investments, net of tax	6	20	(2)	21
Total other comprehensive income (loss), net of tax	1,731	281	1,567	(1,592)
Comprehensive income (loss)	6,346	1,240	9,947	(416)
Less: Comprehensive income attributable to noncontrolling interests and redeemable noncontrolling interests	(506)	(607)	(813)	(904)
Comprehensive income (loss) attributable to AXT, Inc.	$ 5,840	$ 633	$ 9,134	$ (1,320)